Even in reactie op Duckmen...
Deze ground less antennes bestaan nog steeds. Ze zijn speciaal ontworpen voor polyester dak of spiegelmontage (Sirio GL27 ~
http://www.sirioantenne.it/prodotti_ant ... 1091110527 - op dezelfde site vind je eventueel ook antennes voor boten)
Weet nt hoe je engels is? >> The \"no ground plane\" term is actually misleading. As stated before, you need a ground plane if you want your antenna to work as intended. The term \"no ground plane\" refers to the fact that your vehicle doesn't need to supply the ground plane. It is built into the coaxial cable. The idea isn't new. Anyone who has ever owned a boat and used a CB or marine band radio has undoubtedly used a \"no ground plane\" antenna. The design works great on boats and RV's alike. There are, however, a few rules that need to be followed with \"no ground plane\" antennas. They are:
*Do not mix the antenna or coax from one manufacture with those of another manufacturer. They are matched sets.
*Do not use \"no ground plane\" antennas with conventional (existing) coax cables or conventional antennas with \"no ground plane\" coax.
*Do not shorten the length of the coaxial cable. It is very critical. The frequency shifts when as little as 1/2\" is removed.
*If required, you can increase the cables length by adding standard RG-58A/U or RG-8X cable between the radio and existing NGP cable. We recommend that you use high quality cables in nine foot multiples (9, 18, 27 etc.)with PL-259's on both ends. A common barrel connector, such as our AR-4, will be required to join the cables together.
*Do keep at least two-thirds of the antenna above the roof line.
*Do use an SWR meter to tune the antenna in its final mounting location on the the vehicle.
Bron:
http://www.firestik.com/Tech_Docs/CBs_&_RVs.htm
http://www.cbshop.com/shop2.asp?ls=1&di ... g=18&sg=18 Zie de \"Firestik Omega No Ground\"
Ik ga stoppen anders maak ik het te lang...